1. Adjust an oven rack to the middle position and heat the oven to 200 degrees. Shred the zucchini on the large holes of a box grater or in a food processor fitted with the shredding disk. Toss the shredded zucchini with the salt and let it drain in a fine-mesh strainer set over a bowl for 10 minutes. Wrap the zucchini in paper towels and squeeze out the excess liquid. 2. Combine the dried zucchini, feta, scallions, dill, eggs, garlic, and pepper together in a medium bowl. Sprinkle the flour over the mixture and stir until uniformly incorporated. 3. Heat 3 tablespoons of the oil in a 12-inch nonstick skillet over medium heat until shimmering. Drop 2-tablespoon-sized portions of the batter into the pan, then use the back of a spoon to press the batter into 2-inch-wide fritters (you should fit about 6 fritters in the pan at a time). Fry until golden brown on both sides, 2 to 3 minutes per side. 4. Transfer the fritters to a paper towel-lined baking sheet and place in the oven to keep warm. Wipe the skillet clean with paper towels. Return the skillet to medium-high heat, add the remaining 3 tablespoons oil, and repeat with the remaining batter. Serve warm or at room temperature with the lemon wedges.